The stakes have never been higher as the five remaining contestants fight for a spot in next week's Biggest Loser finale. In their last challenge, the contestants take a ride down memory lane to see how far they've come in their 14 weeks on campus. Then one more contestant will be sent home and The Biggest Loser finalists will be revealed.

In this must-see, exciting live finale, all of The Biggest Loser contestants from this season return for a special reunion and a chance to weigh in one last time and show America how much they've all lost since beginning their weight-loss journeys. Then it's the moment viewers have been waiting for, when one of the final four will be named this season's Biggest Loser and win the coveted grand prize of $250,000.

An all-new twist shakes up the fifth season premiere of "The Biggest Loser," heightening the emotion and tension in the competition. For the first time ever in the history of the show, teams of two will compete against each other rather than individuals. Ten teams - including a mother and son, husband-and-wife, best friends, brothers and a divorced couple - have to pick their trainer, weigh in and compete in challenges together. This week, the teams will have to pull a giant hot air balloon across a field, with the winner getting a coveted 2 lb. advantage at the first weigh in.